From 7a057a7899427c053d534f68e4cff2808d6233f2 Mon Sep 17 00:00:00 2001 From: fred gao Date: Fri, 18 Aug 2017 15:41:11 +0800 Subject: [PATCH] drm/i915/gvt: Refine error handling for perform_bb_shadow fix the wrong return type and return error once the unknown command is scanned. v2: - separate this error handle from healthy rating code. (Zhenyu) Signed-off-by: fred gao Signed-off-by: Zhenyu Wang --- drivers/gpu/drm/i915/gvt/cmd_parser.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/gvt/cmd_parser.c b/drivers/gpu/drm/i915/gvt/cmd_parser.c index e53efc0524f45..23a9bbbb65650 100644 --- a/drivers/gpu/drm/i915/gvt/cmd_parser.c +++ b/drivers/gpu/drm/i915/gvt/cmd_parser.c @@ -1576,11 +1576,11 @@ static int batch_buffer_needs_scan(struct parser_exec_state *s) return 1; } -static uint32_t find_bb_size(struct parser_exec_state *s) +static int find_bb_size(struct parser_exec_state *s) { unsigned long gma = 0; struct cmd_info *info; - uint32_t bb_size = 0; + int bb_size = 0; uint32_t cmd_len = 0; bool met_bb_end = false; struct intel_vgpu *vgpu = s->vgpu; @@ -1637,6 +1637,8 @@ static int perform_bb_shadow(struct parser_exec_state *s) /* get the size of the batch buffer */ bb_size = find_bb_size(s); + if (bb_size < 0) + return -EINVAL; /* allocate shadow batch buffer */ entry_obj = kmalloc(sizeof(*entry_obj), GFP_KERNEL); -- 2.39.5